Even if you don’t watch America’s Got Talent, you may have heard of Mandy Harvey. Over the past few months, the singer’s audition for the show has gone viral. Despite being completely deaf since the age of 18, Harvey writes and performs her own songs with perfect pitch.

Harvey advanced to the show’s finale, which aired last night (Sept. 20) and finished in fourth place. While she didn’t win the contest and $1 million purse, she did win a once-in-a-lifetime experience. Country superstar Shania Twain joined Harvey onstage for a surprise performance of Twain’s 1998 smash hit, “You’re Still the One.”

Harvey suffers from a connective tissue disorder that began to affect her hearing when she was born. She became legally deaf at age 10 and later completely deaf around the time she graduated high school.

After performing “You’re Still the One” with Harvey, Shania took the stage solo to perform her newest single, “Life’s About to Get Good.”

“Life’s About to Get Good” is a single from off of Shania Twain’sforthcoming album, Now, which drops Sept. 29. Now will be the first album that Shania’s put out in 15 years, succeeding her tremendously successful Up! LP from 2002.